Highly improved electrooxidation of formaldehyde on nickel/poly (o-toluidine)/Triton X-100 film modified carbon nanotube paste electrode

Silver nanoparticles/poly ortho-toluidine/modified carbon paste electrode as a stable anode for hydrazine oxidation in the alkaline media

“…The oxidation peak current of monomer is decreased with increasing of the number of potential cycles. The decreasing of oxidation current is due to the loss of activity of the electrode surface when covered with a newly formed polymer film [22]. In the second reverse cycle, the new cathodic peak is found at a potential around 0.30 V, confirming the initial deposition of electrooxidized products.…”

“…A decrease in N 2 H 4 electrooxidation current can be observed when the higher monomer concentrations are used. This may be attributed to the simultaneous formation of some oligomers during the polymerization of OT in high concentrations [22]. Thus, formation of the oligomers affects the morphology of the polymer which decreases the amount of Ag nanoparticles dispersed in the film.…”

“…CP matrices have been employed as catalyst support materials for the oxidation of small molecules in place of conventional supports, because when a catalyst is dispersed in carbon black, a part of the active sites remains inaccessible to the reactant molecules. The reason for incorporating metallic particles into the porous matrixes is to increase the specific area of these materials and thereby improve catalytic efficiency [22].…”

Fabrication of bimetallic Cu/Pd particles modified carbon nanotube paste electrode and its use towards formaldehyde electrooxidation

“…Preparation of the CNTPE was carried out according to the previous work [29]. The CNTPE was further electrochemically treated by potential cycling between −0.3 and 1.5 V vs. SCE in 0.5 M H 2 SO 4 solution at υ = 0.10 V s − 1 .…”

“…Previously, in our research group, the electrocatalytic oxidation of formaldehyde has been studied in alkaline media by combination of advantageous features of carbon paste technology, polymer modification and dispersion of nickel on poly (1,5-diaminonaphthalene) [27], poly (N-methyl aniline) [28]. Recently, we have fabricated nickel/poly (o-toluidine) modified carbon nanotube paste electrode (CNTPE) [29] and Pt modified nanostructured poly (1,5-diaminonaphthalene) [30] which can successfully catalyze the formaldehyde oxidation. Also, bimetallic Cu/Pt particles were prepared by galvanic replacement of Cu film with Pt on the CNTPE.…”